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High severity · published Aug 30, 2021
CVE-2021-38385
Tor before 0.3.5.16, 0.4.5.10, and 0.4.6.7 mishandles the relationship between batch-signature verification and single-signature verification, leading to a remote assertion…
7.5
CVSS
1.7%
EPSS
No
On KEV
Description
Tor before 0.3.5.16, 0.4.5.10, and 0.4.6.7 mishandles the relationship between batch-signature verification and single-signature verification, leading to a remote assertion failure, aka TROVE-2021-007.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.7% · higher than 77% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TO
Tor · Torproject
before 0.3.5.16; 0.4.0.0 before 0.4.5.10; 0.4.6.0 before 0.4.6.7 · source: NVD
Affected product
TO
Tor
Torproject
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-38385
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-38385
Release Notes
https://blog.torproject.org
Release Notes
https://blog.torproject.org/node/2062
Exploit
https://bugs.torproject.org/tpo/core/tor/40078
security.gentoo.org
https://security.gentoo.org/glsa/202305-11
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